Contributors: 35
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Eric Sandeen |
458 |
21.54% |
2 |
2.56% |
| Roman Zippel |
413 |
19.43% |
3 |
3.85% |
| Andrew Morton |
382 |
17.97% |
6 |
7.69% |
| Linus Torvalds (pre-git) |
301 |
14.16% |
13 |
16.67% |
| Artem B. Bityutskiy |
142 |
6.68% |
2 |
2.56% |
| Linus Torvalds |
120 |
5.64% |
5 |
6.41% |
| Al Viro |
61 |
2.87% |
13 |
16.67% |
| Christoph Hellwig |
28 |
1.32% |
2 |
2.56% |
| Brian Gerst |
25 |
1.18% |
1 |
1.28% |
| Américo Wang |
21 |
0.99% |
1 |
1.28% |
| Art Haas |
20 |
0.94% |
1 |
1.28% |
| Joe Perches |
18 |
0.85% |
1 |
1.28% |
| Coly Li |
18 |
0.85% |
1 |
1.28% |
| Eric W. Biedermann |
18 |
0.85% |
2 |
2.56% |
| Leo Stone |
16 |
0.75% |
1 |
1.28% |
| David Howells |
11 |
0.52% |
2 |
2.56% |
| Alexey Khoroshilov |
9 |
0.42% |
1 |
1.28% |
| Alan Cox |
9 |
0.42% |
1 |
1.28% |
| Kees Cook |
8 |
0.38% |
1 |
1.28% |
| Christoph Lameter |
6 |
0.28% |
3 |
3.85% |
| Dave Jones |
6 |
0.28% |
2 |
2.56% |
| Andreas Gruenbacher |
6 |
0.28% |
1 |
1.28% |
| Jeff Johnson |
5 |
0.24% |
1 |
1.28% |
| Desmond Cheong Zhi Xi |
4 |
0.19% |
1 |
1.28% |
| Kirill A. Shutemov |
4 |
0.19% |
1 |
1.28% |
| Colin Leroy |
3 |
0.14% |
1 |
1.28% |
| Song Muchun |
3 |
0.14% |
1 |
1.28% |
| Nicholas Piggin |
3 |
0.14% |
1 |
1.28% |
| Vladimir Davydov |
2 |
0.09% |
1 |
1.28% |
| Robert P. J. Day |
1 |
0.05% |
1 |
1.28% |
| Adrian Bunk |
1 |
0.05% |
1 |
1.28% |
| Matthias Kaehlcke |
1 |
0.05% |
1 |
1.28% |
| Steven Whitehouse |
1 |
0.05% |
1 |
1.28% |
| Jan Kara |
1 |
0.05% |
1 |
1.28% |
| Josef 'Jeff' Sipek |
1 |
0.05% |
1 |
1.28% |
| Total |
2126 |
|
78 |
|
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/*
* linux/fs/hfs/super.c
*
* Copyright (C) 1995-1997 Paul H. Hargrove
* (C) 2003 Ardis Technologies <roman@ardistech.com>
* This file may be distributed under the terms of the GNU General Public License.
*
* This file contains hfs_read_super(), some of the super_ops and
* init_hfs_fs() and exit_hfs_fs(). The remaining super_ops are in
* inode.c since they deal with inodes.
*
* Based on the minix file system code, (C) 1991, 1992 by Linus Torvalds
*/
#include <linux/module.h>
#include <linux/blkdev.h>
#include <linux/backing-dev.h>
#include <linux/fs_context.h>
#include <linux/fs_parser.h>
#include <linux/mount.h>
#include <linux/init.h>
#include <linux/nls.h>
#include <linux/seq_file.h>
#include <linux/slab.h>
#include <linux/vfs.h>
#include "hfs_fs.h"
#include "btree.h"
static struct kmem_cache *hfs_inode_cachep;
MODULE_DESCRIPTION("Apple Macintosh file system support");
MODULE_LICENSE("GPL");
static int hfs_sync_fs(struct super_block *sb, int wait)
{
hfs_mdb_commit(sb);
return 0;
}
/*
* hfs_put_super()
*
* This is the put_super() entry in the super_operations structure for
* HFS filesystems. The purpose is to release the resources
* associated with the superblock sb.
*/
static void hfs_put_super(struct super_block *sb)
{
cancel_delayed_work_sync(&HFS_SB(sb)->mdb_work);
hfs_mdb_close(sb);
/* release the MDB's resources */
hfs_mdb_put(sb);
}
static void flush_mdb(struct work_struct *work)
{
struct hfs_sb_info *sbi;
struct super_block *sb;
sbi = container_of(work, struct hfs_sb_info, mdb_work.work);
sb = sbi->sb;
spin_lock(&sbi->work_lock);
sbi->work_queued = 0;
spin_unlock(&sbi->work_lock);
hfs_mdb_commit(sb);
}
void hfs_mark_mdb_dirty(struct super_block *sb)
{
struct hfs_sb_info *sbi = HFS_SB(sb);
unsigned long delay;
if (sb_rdonly(sb))
return;
spin_lock(&sbi->work_lock);
if (!sbi->work_queued) {
delay = msecs_to_jiffies(dirty_writeback_interval * 10);
queue_delayed_work(system_long_wq, &sbi->mdb_work, delay);
sbi->work_queued = 1;
}
spin_unlock(&sbi->work_lock);
}
/*
* hfs_statfs()
*
* This is the statfs() entry in the super_operations structure for
* HFS filesystems. The purpose is to return various data about the
* filesystem.
*
* changed f_files/f_ffree to reflect the fs_ablock/free_ablocks.
*/
static int hfs_statfs(struct dentry *dentry, struct kstatfs *buf)
{
struct super_block *sb = dentry->d_sb;
u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
buf->f_type = HFS_SUPER_MAGIC;
buf->f_bsize = sb->s_blocksize;
buf->f_blocks = (u32)HFS_SB(sb)->fs_ablocks * HFS_SB(sb)->fs_div;
buf->f_bfree = (u32)HFS_SB(sb)->free_ablocks * HFS_SB(sb)->fs_div;
buf->f_bavail = buf->f_bfree;
buf->f_files = HFS_SB(sb)->fs_ablocks;
buf->f_ffree = HFS_SB(sb)->free_ablocks;
buf->f_fsid = u64_to_fsid(id);
buf->f_namelen = HFS_NAMELEN;
return 0;
}
static int hfs_reconfigure(struct fs_context *fc)
{
struct super_block *sb = fc->root->d_sb;
sync_filesystem(sb);
fc->sb_flags |= SB_NODIRATIME;
if ((bool)(fc->sb_flags & SB_RDONLY) == sb_rdonly(sb))
return 0;
if (!(fc->sb_flags & SB_RDONLY)) {
if (!(HFS_SB(sb)->mdb->drAtrb & cpu_to_be16(HFS_SB_ATTRIB_UNMNT))) {
pr_warn("filesystem was not cleanly unmounted, running fsck.hfs is recommended. leaving read-only.\n");
sb->s_flags |= SB_RDONLY;
fc->sb_flags |= SB_RDONLY;
} else if (HFS_SB(sb)->mdb->drAtrb & cpu_to_be16(HFS_SB_ATTRIB_SLOCK)) {
pr_warn("filesystem is marked locked, leaving read-only.\n");
sb->s_flags |= SB_RDONLY;
fc->sb_flags |= SB_RDONLY;
}
}
return 0;
}
static int hfs_show_options(struct seq_file *seq, struct dentry *root)
{
struct hfs_sb_info *sbi = HFS_SB(root->d_sb);
if (sbi->s_creator != cpu_to_be32(0x3f3f3f3f))
seq_show_option_n(seq, "creator", (char *)&sbi->s_creator, 4);
if (sbi->s_type != cpu_to_be32(0x3f3f3f3f))
seq_show_option_n(seq, "type", (char *)&sbi->s_type, 4);
seq_printf(seq, ",uid=%u,gid=%u",
from_kuid_munged(&init_user_ns, sbi->s_uid),
from_kgid_munged(&init_user_ns, sbi->s_gid));
if (sbi->s_file_umask != 0133)
seq_printf(seq, ",file_umask=%o", sbi->s_file_umask);
if (sbi->s_dir_umask != 0022)
seq_printf(seq, ",dir_umask=%o", sbi->s_dir_umask);
if (sbi->part >= 0)
seq_printf(seq, ",part=%u", sbi->part);
if (sbi->session >= 0)
seq_printf(seq, ",session=%u", sbi->session);
if (sbi->nls_disk)
seq_printf(seq, ",codepage=%s", sbi->nls_disk->charset);
if (sbi->nls_io)
seq_printf(seq, ",iocharset=%s", sbi->nls_io->charset);
if (sbi->s_quiet)
seq_printf(seq, ",quiet");
return 0;
}
static struct inode *hfs_alloc_inode(struct super_block *sb)
{
struct hfs_inode_info *i;
i = alloc_inode_sb(sb, hfs_inode_cachep, GFP_KERNEL);
return i ? &i->vfs_inode : NULL;
}
static void hfs_free_inode(struct inode *inode)
{
kmem_cache_free(hfs_inode_cachep, HFS_I(inode));
}
static const struct super_operations hfs_super_operations = {
.alloc_inode = hfs_alloc_inode,
.free_inode = hfs_free_inode,
.write_inode = hfs_write_inode,
.evict_inode = hfs_evict_inode,
.put_super = hfs_put_super,
.sync_fs = hfs_sync_fs,
.statfs = hfs_statfs,
.show_options = hfs_show_options,
};
enum {
opt_uid, opt_gid, opt_umask, opt_file_umask, opt_dir_umask,
opt_part, opt_session, opt_type, opt_creator, opt_quiet,
opt_codepage, opt_iocharset,
};
static const struct fs_parameter_spec hfs_param_spec[] = {
fsparam_u32 ("uid", opt_uid),
fsparam_u32 ("gid", opt_gid),
fsparam_u32oct ("umask", opt_umask),
fsparam_u32oct ("file_umask", opt_file_umask),
fsparam_u32oct ("dir_umask", opt_dir_umask),
fsparam_u32 ("part", opt_part),
fsparam_u32 ("session", opt_session),
fsparam_string ("type", opt_type),
fsparam_string ("creator", opt_creator),
fsparam_flag ("quiet", opt_quiet),
fsparam_string ("codepage", opt_codepage),
fsparam_string ("iocharset", opt_iocharset),
{}
};
/*
* hfs_parse_param()
*
* This function is called by the vfs to parse the mount options.
*/
static int hfs_parse_param(struct fs_context *fc, struct fs_parameter *param)
{
struct hfs_sb_info *hsb = fc->s_fs_info;
struct fs_parse_result result;
int opt;
/* hfs does not honor any fs-specific options on remount */
if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE)
return 0;
opt = fs_parse(fc, hfs_param_spec, param, &result);
if (opt < 0)
return opt;
switch (opt) {
case opt_uid:
hsb->s_uid = result.uid;
break;
case opt_gid:
hsb->s_gid = result.gid;
break;
case opt_umask:
hsb->s_file_umask = (umode_t)result.uint_32;
hsb->s_dir_umask = (umode_t)result.uint_32;
break;
case opt_file_umask:
hsb->s_file_umask = (umode_t)result.uint_32;
break;
case opt_dir_umask:
hsb->s_dir_umask = (umode_t)result.uint_32;
break;
case opt_part:
hsb->part = result.uint_32;
break;
case opt_session:
hsb->session = result.uint_32;
break;
case opt_type:
if (strlen(param->string) != 4) {
pr_err("type requires a 4 character value\n");
return -EINVAL;
}
memcpy(&hsb->s_type, param->string, 4);
break;
case opt_creator:
if (strlen(param->string) != 4) {
pr_err("creator requires a 4 character value\n");
return -EINVAL;
}
memcpy(&hsb->s_creator, param->string, 4);
break;
case opt_quiet:
hsb->s_quiet = 1;
break;
case opt_codepage:
if (hsb->nls_disk) {
pr_err("unable to change codepage\n");
return -EINVAL;
}
hsb->nls_disk = load_nls(param->string);
if (!hsb->nls_disk) {
pr_err("unable to load codepage \"%s\"\n",
param->string);
return -EINVAL;
}
break;
case opt_iocharset:
if (hsb->nls_io) {
pr_err("unable to change iocharset\n");
return -EINVAL;
}
hsb->nls_io = load_nls(param->string);
if (!hsb->nls_io) {
pr_err("unable to load iocharset \"%s\"\n",
param->string);
return -EINVAL;
}
break;
default:
return -EINVAL;
}
return 0;
}
/*
* hfs_read_super()
*
* This is the function that is responsible for mounting an HFS
* filesystem. It performs all the tasks necessary to get enough data
* from the disk to read the root inode. This includes parsing the
* mount options, dealing with Macintosh partitions, reading the
* superblock and the allocation bitmap blocks, calling
* hfs_btree_init() to get the necessary data about the extents and
* catalog B-trees and, finally, reading the root inode into memory.
*/
static int hfs_fill_super(struct super_block *sb, struct fs_context *fc)
{
struct hfs_sb_info *sbi = HFS_SB(sb);
struct hfs_find_data fd;
hfs_cat_rec rec;
struct inode *root_inode;
int silent = fc->sb_flags & SB_SILENT;
int res;
/* load_nls_default does not fail */
if (sbi->nls_disk && !sbi->nls_io)
sbi->nls_io = load_nls_default();
sbi->s_dir_umask &= 0777;
sbi->s_file_umask &= 0577;
spin_lock_init(&sbi->work_lock);
INIT_DELAYED_WORK(&sbi->mdb_work, flush_mdb);
sbi->sb = sb;
sb->s_op = &hfs_super_operations;
sb->s_xattr = hfs_xattr_handlers;
sb->s_flags |= SB_NODIRATIME;
mutex_init(&sbi->bitmap_lock);
res = hfs_mdb_get(sb);
if (res) {
if (!silent)
pr_warn("can't find a HFS filesystem on dev %s\n",
hfs_mdb_name(sb));
res = -EINVAL;
goto bail;
}
/* try to get the root inode */
res = hfs_find_init(HFS_SB(sb)->cat_tree, &fd);
if (res)
goto bail_no_root;
res = hfs_cat_find_brec(sb, HFS_ROOT_CNID, &fd);
if (!res) {
if (fd.entrylength != sizeof(rec.dir)) {
res = -EIO;
goto bail_hfs_find;
}
hfs_bnode_read(fd.bnode, &rec, fd.entryoffset, fd.entrylength);
if (rec.type != HFS_CDR_DIR)
res = -EIO;
}
if (res)
goto bail_hfs_find;
res = -EINVAL;
root_inode = hfs_iget(sb, &fd.search_key->cat, &rec);
hfs_find_exit(&fd);
if (!root_inode)
goto bail_no_root;
sb->s_d_op = &hfs_dentry_operations;
res = -ENOMEM;
sb->s_root = d_make_root(root_inode);
if (!sb->s_root)
goto bail_no_root;
/* everything's okay */
return 0;
bail_hfs_find:
hfs_find_exit(&fd);
bail_no_root:
pr_err("get root inode failed\n");
bail:
hfs_mdb_put(sb);
return res;
}
static int hfs_get_tree(struct fs_context *fc)
{
return get_tree_bdev(fc, hfs_fill_super);
}
static void hfs_free_fc(struct fs_context *fc)
{
kfree(fc->s_fs_info);
}
static const struct fs_context_operations hfs_context_ops = {
.parse_param = hfs_parse_param,
.get_tree = hfs_get_tree,
.reconfigure = hfs_reconfigure,
.free = hfs_free_fc,
};
static int hfs_init_fs_context(struct fs_context *fc)
{
struct hfs_sb_info *hsb;
hsb = kzalloc(sizeof(struct hfs_sb_info), GFP_KERNEL);
if (!hsb)
return -ENOMEM;
fc->s_fs_info = hsb;
fc->ops = &hfs_context_ops;
if (fc->purpose != FS_CONTEXT_FOR_RECONFIGURE) {
/* initialize options with defaults */
hsb->s_uid = current_uid();
hsb->s_gid = current_gid();
hsb->s_file_umask = 0133;
hsb->s_dir_umask = 0022;
hsb->s_type = cpu_to_be32(0x3f3f3f3f); /* == '????' */
hsb->s_creator = cpu_to_be32(0x3f3f3f3f); /* == '????' */
hsb->s_quiet = 0;
hsb->part = -1;
hsb->session = -1;
}
return 0;
}
static struct file_system_type hfs_fs_type = {
.owner = THIS_MODULE,
.name = "hfs",
.kill_sb = kill_block_super,
.fs_flags = FS_REQUIRES_DEV,
.init_fs_context = hfs_init_fs_context,
};
MODULE_ALIAS_FS("hfs");
static void hfs_init_once(void *p)
{
struct hfs_inode_info *i = p;
inode_init_once(&i->vfs_inode);
}
static int __init init_hfs_fs(void)
{
int err;
hfs_inode_cachep = kmem_cache_create("hfs_inode_cache",
sizeof(struct hfs_inode_info), 0,
SLAB_HWCACHE_ALIGN|SLAB_ACCOUNT, hfs_init_once);
if (!hfs_inode_cachep)
return -ENOMEM;
err = register_filesystem(&hfs_fs_type);
if (err)
kmem_cache_destroy(hfs_inode_cachep);
return err;
}
static void __exit exit_hfs_fs(void)
{
unregister_filesystem(&hfs_fs_type);
/*
* Make sure all delayed rcu free inodes are flushed before we
* destroy cache.
*/
rcu_barrier();
kmem_cache_destroy(hfs_inode_cachep);
}
module_init(init_hfs_fs)
module_exit(exit_hfs_fs)